But getting to your brain cells is tricky, and amino acids have to compete for limited access.

但胺基酸不容易到达脑细胞，而且必须有限的机会。

You may remember that amino acids are unique, in that they have nitrogen in their amine groups.

你可能记得氨基酸独一无二的，因为它们的胺基中含有氮。

Meanwhile, proteins and amino acids, the building block nutrients of growth and development, manipulate how we feel and behave.

同时，蛋质和胺基酸生长和发育的基本营养素，影响我们的感觉和行为。

Tetrodotoxin is covered on its surface with polar alcohol and Amin groups.

河豚毒素表面覆盖有极性醇和胺基。

Now, genes are short segments of DNA that code for amino acids.

胺基酸的密码。

And amino acids are the building blocks of proteins.

而胺基酸蛋质的元件。

But the amine group isn't used in those storage molecules, so it's converted to NH3, or ammonia, which happens to be toxic.

但胺基没有用于那些储存分子，所以它被转化为 NH3，也就氨，碰巧有毒。

Remember, ammonia is NH3, so that " am" from ammonia gets stuck onto that amine group.

请记住，氨 NH3，因此来自氨的“am”会粘在该胺基上。

That, along with it containing tyrosine, an amino acid that aids neurotransmitter production, may make it hard to get some rest if you have a bunch of protein before bed.

因为它含有酪氨酸，酪氨酸一种帮助合神经传递物质的胺基酸。因此如果你在睡前食用蛋质类食品，便可能造睡眠困难。